Za'atar (Arabic: زَعْتَر, IPA: [ˈzaʕtar]) is a generic name for a family of related Middle Eastern herbs from the genera Origanum (oregano), Calamintha (basil thyme), Thymus (typically Thymus vulgaris, i.e., thyme), and Satureja (savory). The za'atar as used as a culinary alone most properly applies to Origanum syriacum, considered by many to be the hyssop (Hebrew: אזוב Hebrew pronunciation: [eˈzov]) of the Bible. It is also the name for a condiment made from the dried herb(s), mixed with sesame seeds, dried sumac, and often salt, as well as other spices. Used in Levantine cuisine, both the herb and spice mixture are popular throughout the Middle East.
Written history lacks an early definitive reference to za'atar as a spice mixture, though unidentified terms in the Yale Babylonian Collection may be references to spice blends. According to Ignace J. Gelb, an Akkadian language word that can be read sarsar may refer to a spice plant. This word could be attested in the Syriac satre, and Arabic za'atar (or sa'tar), possibly the source of Latin Satureia. Satureia (Satureja) is a common name for Satureja thymbra, a species of savory whose other common and ethnic names include, "Persian za'atar", "za'atar rumi" (Roman hyssop), and "za'atar franji" (European hyssop).